A rectangular box without lid has a length of 1.5 m, a width of 0.6 m and a height of 8 dm. The outside of the barrel is pain

2 bình luận về “A rectangular box without lid has a length of 1.5 m, a width of 0.6 m and a height of 8 dm. The outside of the barrel is pain”

1. Change:  8dm = 0,8m

   Perimeter of the base of the rectangular box is:

              (1,5 + 0,6) × 2 = 4,2 (m)

   Acreage around of the rectangular box is:

               4,2 × 0,8 = 3,36 (m²)

   The area of ​​the base of the rectangular box is:

              1,5 × 0,6 = 0,9 (m²)

   So the painted area is:

               3,36 + 0,9 = 4,26 (m²)

                           Đáp số : 4,26 m²

   Trả lời
2. Convert 8dm = 0.8m
   The surrounding area of ​​the crate is:
   2×0.8x(1.5+0.6)=3.36(m2)
   The area of ​​the base of the figure is:
   1.5×0.6=0.9(m2)
   Painted area is:
   3.36+0.9=4.26(m2)
   Answer: 4.26m2

   Trả lời